    <meta name="viewport" content="width=device-width,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no">
    <meta charset="utf-8"/>
<style>
.s1{
height:30px;
width:300px;
background-image:linear-gradient(to bottom,#227bb9,#afd7f2);
font-size:18px;
color:white;
font-weight:700；
line-height:35px;
}


h3{
height:30px;
width:260px;
background-image:linear-gradient(to top,#afd7f2,#227bb9,#afd7f2);
font-size:14px;
font-weight:700;
line-height:30px;
}

h3 a:link{
color:blue;
text-decoration:none;
}

h3 a:hover{
color:yellow;
text-decoration:underline;
}

li{
list-style:none;
font-size:12px;
line-height:26px;
}

li>a:link{
color:yellow;
text-decoration:none;
}

li>a:hover{
color:red;
text-decoration:underline;
}

</style>
<!--font-weight字体宽度，就是加粗的意思，有9个等级-->
<head>
</head>
<body>
<h2 class="s1">家用电器</h2>
<ul>
<li><h3><a href="#">大家电</a></h3></li>
<li><a href="#">平板电视</a> <a href="#">洗衣机</a> <a href="#">冰箱</a></li>
<li> <a href="#">空调</a> <a href="#">烟机/灶具</a>  <a href="#">热水器</a></li>
<li><a href="#">冷柜/酒柜</a>  <a href="#">消毒柜</a>  <a href="#">家庭影院</a></li>
</ul>
<ul>
<h3><a href="#">生活电器</a></h3>
<li><a href="#">电风扇</a>  <a href="#">净化器</a>  <a href="#">吸尘器</a></li>
<li> <a href="#">净水设备</a>  <a href="#">挂烫机</a>  <a href="#">电话机</a></li>
</ul>
<ul>
<h3><a href="#">厨房电器</a></h3>
<li><a href="#">榨汁机</a>  <a href="#">电压力锅</a>  <a href="#">电饭煲</a></li>
<li><a href="#">豆浆机</a>  <a href="#">微波炉</a>  <a href="#">电磁炉</a></li>
</ul>

<ul>
<h3><a href="#">五金家装</a></h3>
<li><a href="#">淋浴/水槽</a>  <a href="#">电动工具</a>  <a href="#">手动工具</a></li>
<li><a href="#">仪器仪表</a>  <a href="#">浴霸/排气</a>  <a href="#">灯具</a></li>
</ul>
</body>